23. A solid cuboid of iron with dimensions 53 cm x 40 cm x 15 cm is melted and recast into a cylindrical pipe. The outer and inner diameters of the pipe are 8 cm and 7 cm, respectively. Find the length of the pipe.
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Explain the question using, formulas given in the chapter.
Class 10th, Cbse, RD Sharma, Surface area and volumes.